CN107995967A - A kind of contact panel, terminal device and the method for detected touch point - Google Patents
A kind of contact panel, terminal device and the method for detected touch point Download PDFInfo
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- CN107995967A CN107995967A CN201680001630.8A CN201680001630A CN107995967A CN 107995967 A CN107995967 A CN 107995967A CN 201680001630 A CN201680001630 A CN 201680001630A CN 107995967 A CN107995967 A CN 107995967A
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- signal
- touch
- drive signal
- drive
- drive module
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
Abstract
A kind of contact panel (200), can solve the problems, such as that the touch-control sensitivity that suspended state is brought declines.Contact panel (200) includes：Drive module (210), touch chip (220), multiple driving passages (230) and multiple induction channels (240), drive module (210) is connected with touch chip (220), touch chip (220) is used for the first drive signal and the second drive signal for receiving drive module transmission, to drive multiple driving passages (230) to work by the voltage difference between the first drive signal and the second drive signal；Multiple induction channels (240) are used to gather inductive signal, inductive signal is the coupled signal between the multiple driving passages (230) for the voltage difference driving being subject between the first drive signal and the second drive signal and multiple induction channels (240), and touch chip (220) is used for the coordinate information that the touch point on contact panel is determined according to inductive signal.
Description
Technical field
The invention relates to electronics field, and more particularly, to a kind of contact panel, terminal device and
Method for detected touch point.
Background technology
With the development of touch technology, application of the ultra-thin screen in terminal device is more and more.But touch-screen (or
Say, touch screen, contact panel) it can show different sensitivity when terminal device is in different placement statuses.For example, work as
When smart mobile phone (that is, an example of terminal device) is lain in a horizontal plane on nonconducting desktop, touch-control sensitivity may be than relatively low, this
It is that the coupled capacitor between people and mobile phone ground is smaller, the sensing for causing touch-screen to detect because touch-screen is in suspended state
Signal cannot reflect coupled capacitor exactly, so as to cause sensitivity of touch screen to decline.
Accordingly, it is desirable to provide a kind of technology, can solve touch-screen and be under the touch-control sensitivity brought during suspended state
The problem of drop.
The content of the invention
The embodiment of the present application provides a kind of contact panel, terminal device and the method for detected touch point, passes through driving
Module realize touch chip floatingly so that the touch-control sensitivity for solving the problems, such as to bring by suspended state declines.
First aspect, there is provided a kind of contact panel, including：Drive module, touch chip, multiple driving passages and multiple
Induction channels, the high drive module are connected with the touch chip, and the multiple driving passage and the multiple sensing are logical
Road is connected with the touch chip respectively, wherein,
The touch chip is used to receive the first drive signal and the second drive signal that the drive module is sent, with logical
The voltage difference crossed between first drive signal and second drive signal drives the multiple driving channels operation；
The multiple induction channels are used to gather inductive signal, the inductive signal for be subject to first drive signal with
Coupling between the multiple driving passage of voltage difference driving between second drive signal and the multiple induction channels
Signal；
The touch chip is used for the coordinate information that the touch point on contact panel is determined according to the inductive signal.
Therefore, the first drive signal is sent to touch chip by the embodiment of the present application by drive module so that touch-control core
The first drive signal has been accessed in one end that piece is originally used for catcher machine ground, and in other words, drive module with instead of mobile phone, becomes
The ground connection reference point of touch chip, i.e. touch chip thinks that the input terminal of first drive signal is reference ground, so as to fulfill floating
Ground.Floating ground, you can be connected with being interpreted as the ground of the circuit without conductor with mobile phone.And (in other words, driven relative to touch chip
Passage) for, using the input terminal of first drive signal as reference, become there is fluctuation to believe originally the mobile phone of no fluctuation signal
Number, and people be in the state that is connected with mobile phone, therefore, when people's touch glass cover board, can produce inductive signal, induction channels
The inductive signal detected is fed back into touch chip, and then determines the coordinate information of touch point, that is, the position of touch point.
So as to solve the problems, such as that the touch-control sensitivity brought by suspended state declines.
With reference to first aspect, in the first possible implementation of first aspect, the drive module is additionally operable to connect
Synchronous input signal is received, and the synchronous input signal is handled, obtains and exports first drive signal, wherein,
The synchronous input signal is the rectangular wave synchronous with the touch chip.
Further, the touch chip includes synchronous output end, defeated for the synchronization into the drive module
Enter end and input the synchronous input signal.
Therefore, synchronous input signal is inputted to drive module by touch chip, ensure that the synchronous input signal with touching
Control the synchronization of the drive signal and signal sampling of chip.
The possible implementation of with reference to first aspect the first, in second of possible implementation of first aspect
In, the touch chip includes the first feeder ear and the first ground terminal, and the drive module includes operating voltage input terminal, synchronization
Input terminal, the second feeder ear and the second ground terminal, the synchronous input end are connected with second ground terminal, second ground connection
End is connected with first ground terminal, and first feeder ear is connected with second feeder ear,
The drive module is specifically used for receiving the synchronous input signal by the synchronous input end, and by described
Operating voltage input terminal receives second drive signal；
The drive module is specifically used for inputting first drive to first ground terminal by second ground terminal
Dynamic signal, and be used to by second feeder ear to input second drive signal to first feeder ear, described second
It is parallel with capacitance between feeder ear and second ground terminal, the capacitance is used to keeping second drive signal and described the
Voltage difference between one drive signal is basically unchanged.
Second of possible implementation with reference to first aspect, in the third possible implementation of first aspect
In, the drive module includes：First phase inverter, the second phase inverter and the first diode,
Wherein, first phase inverter is connected with second inverter series, the input terminal of first phase inverter with
The synchronous input end is connected, and the output terminal of second phase inverter is connected with second ground terminal, and the operating voltage is defeated
Enter end by first diode with second feeder ear to be connected, to drive to second feeder ear input described second
Signal, and the operating voltage input terminal is connected with the operating voltage end of first phase inverter and second phase inverter.
Second of possible implementation with reference to first aspect, in the 4th kind of possible implementation of first aspect
In, the drive module includes：3rd phase inverter, the 4th phase inverter, the second diode, booster circuit and level shifting circuit,
Wherein, the 3rd phase inverter is connected with the 4th inverter series, and the input terminal of the 3rd phase inverter leads to
Cross the level shifting circuit with the synchronous input end to be connected, output terminal and second ground terminal of the 4th phase inverter
It is connected, the operating voltage input terminal is connected by second diode with second feeder ear, to be supplied to described second
Electric end inputs second drive signal, and the operating voltage input terminal passes through the booster circuit and the 3rd phase inverter
It is connected with the operating voltage end of the 4th phase inverter.
With reference to first aspect or its above-mentioned possible implementation, in the 5th kind of possible implementation of first aspect
In, the contact panel is configured in terminal device, and the drive module is connected with the main control chip of the terminal device, described
Main control chip is used to input second drive signal to the drive module.
With reference to first aspect or its above-mentioned possible implementation, in the 6th kind of possible implementation of first aspect
In, the contact panel is configured in terminal device, and the touch chip passes through with the main control chip of the terminal device to communicate
Bus connects, and the touch chip is additionally operable to send the coordinate information to the main control chip by the communication bus.
Second aspect, there is provided a kind of terminal device, including：
Main control chip；With
Contact panel described in first aspect or any possible implementation of first aspect.
Wherein, the main control chip is connected with the touch chip.
Therefore, the terminal device of the embodiment of the present application, the floating of touch chip is realized by drive module, thus solve because
The touch-control sensitivity that suspended state is brought declines problem.
The third aspect, there is provided a kind of method for detected touch point, it is characterised in that the method is applied to configuration
Have in the terminal device of contact panel, the contact panel includes：Drive module, touch chip, multiple driving passages and multiple
Induction channels, the drive module are connected with the touch chip, the multiple driving passage and the multiple induction channels point
It is not connected with the touch chip, the described method includes：
The touch chip receives the first drive signal and the second drive signal that the drive module is sent, and according to institute
The voltage difference between the first drive signal and second drive signal is stated to be used to drive the multiple driving channels operation；
The multiple induction channels gather inductive signal, the inductive signal for be subject to first drive signal with it is described
Coupled signal between the multiple driving passage of voltage difference driving between second drive signal and the multiple induction channels；
The touch chip determines the coordinate information of the touch point on contact panel according to the inductive signal.
With reference to the third aspect, in the first possible implementation of the third aspect, institute is received in the touch chip
Before the first drive signal for stating drive module transmission, the method further includes：
The drive module receives synchronous input signal, and the synchronous input signal is the square synchronous with the touch chip
Shape ripple；
The drive module handles the synchronous input signal, obtains and exports first drive signal.
Therefore, the method for detected touch point of the embodiment of the present application, the floating of touch chip is realized by drive module
Ground, so that the touch-control sensitivity for solving the problems, such as to bring by suspended state declines.
With reference to the first possible implementation of the third aspect, in second of possible implementation of the third aspect
In, the touch chip includes the first feeder ear and the first ground terminal, and the drive module includes operating voltage input terminal, synchronization
Input terminal, the second feeder ear and the second ground terminal,
The method further includes：
The drive module receives the synchronous input signal by the synchronous input end, and is grounded by described second
Hold to first ground terminal and input first drive signal；
The drive module receives second drive signal by the operating voltage input terminal, and passes through described second
Feeder ear inputs second drive signal to first feeder ear.
With reference to the third aspect or its above-mentioned possible implementation, in the third possible implementation of the third aspect
In, the terminal device further includes main control chip,
The method further includes：
The main control chip inputs second drive signal to operating voltage input terminal.
With reference to the third aspect or its above-mentioned possible implementation, in the 4th kind of possible implementation of the third aspect
In, the terminal device further includes main control chip,
The method further includes：
The touch chip sends the coordinate information by communication bus to the main control chip.
In some possible implementations, the scan period when a length of 10 milliseconds.
Brief description of the drawings
Fig. 1 is the schematic diagram of the system architecture of contact panel in the prior art.
Fig. 2 is the schematic diagram according to the contact panel of the embodiment of the present application.
Fig. 3 is the schematic circuit according to the drive module of the application one embodiment.
Fig. 4 is the schematic circuit according to the drive module of the application another embodiment.
Fig. 5 is the sequence diagram of the drive signal for detected touch point of the contact panel applied to the embodiment of the present application.
Fig. 6 a and Fig. 6 b are the circuit diagram of the contact panel of the embodiment of the present application.
Fig. 7 a and Fig. 7 b be the embodiment of the present application contact panel in each induction point capacitance variations schematic diagram.
Fig. 8 is the indicative flowchart according to the method for detected touch point of the embodiment of the present application.
Fig. 9 is the schematic block diagram according to the terminal device of the embodiment of the present application.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, the technical solution in the embodiment of the present application is clearly retouched
State.
In order to make it easy to understand, combining the system architecture of contact panel illustrated in fig. 1 first, description detects in the prior art
The method of the touch point of touch-screen.It is to be understood that the method for the touch point of the detection touch-screen of the embodiment of the present application is not limited to Fig. 1
The method of the touch point of the detection touch-screen of shown system architecture, i.e. the embodiment of the present application is except that can detect shown in Fig. 1
The touch point of touch-screen, it can be also used for the touch point of the touch-screen of detection other structures.
Fig. 1 is the schematic diagram of the system architecture of contact panel in the prior art.As shown in Figure 1, the system can include touching
Touch screen (in other words, contact panel) 110 and touch chip 120.Touch-screen 110 can be capacitive touch screen, more specifically may be used
To be projection-type mutual capacitance touchscreens.Wherein, touch-screen 110 includes multiple (for example, M, M is natural number) driving passages and more
A (for example, N number of, N is natural number) induction channels.It is to be understood that the embodiment of the present application for M and N value and be not particularly limited,
M and N can be equal or different natural number.
Wherein, touch chip 120 is referred to as touch controller or touch detection module.Touch chip 120 can divide
It is not connected with M driving passage, N number of induction channels.Specifically, touch chip can include drive circuit and (or claim driving single
Member) 121 and sensor circuit (or claim sensing unit) 122, drive circuit 121 can be with M driving passage phase of touch-screen 110
Even, sensor circuit 122 can be connected with N number of induction channels of touch-screen 110.
The drive circuit 121 of touch chip 120 is used to drive passage output drive signal, touch-control to M of touch-screen 110
The sensor circuit 122 of chip 120 is used to receive or the inductive signal of N number of induction channels of induction touch panel output.
M driving passage of touch-screen 110 is used to input the drive signal that the drive circuit 121 of touch chip 120 exports,
N number of induction channels of touch-screen 110 be used for touch chip 120 drive circuit 121 to touch-screen 110 some driving passage
During the drive signal of output, inductive signal is exported to the sensor circuit 122 of touch chip 120.
At present, touch chip 120 is at the touch point on detecting touch-screen 110, within a scan period, touch chip
At least one driving passage of 120 drive circuit 121 into M driving passage of touch-screen 110 is (for example, it is logical to be denoted as driving
Road #1) output drive signal, touch-screen 110 pass through driving passage #1 receive drive signal.Due to driving passage on touch-screen
There are coupled capacitor between induction channels, so induction channels can sense the signal for carrying out self-driven passage, i.e., in induction channels
The coupled signal (in other words, inductive signal) of drive signal can be produced.Then, N number of induction channels of touch-screen 110 are successively to tactile
The sensor circuit of control chip 120 exports the inductive signal in the induction channels, and the sensor circuit of touch chip 120 receives each sense
The inductive signal for answering passage to export.Finally, touch chip 120 can be according to the drive circuit 121 of touch chip 120 to touch-screen
Believe after 110 M driving passage difference all output drive signals, from all sensings of N number of induction channels reception of touch-screen 110
Number detection touch-screen on touch point, calculate the coordinate information of the touch point, in other words, position the touch point.
But when touch-screen (terminal device in other words, being configured with the touch-screen) is in suspended state, induction channels
The coupled capacitor detected will not change, or the change of very little only occurs, so that touch point cannot be positioned exactly, make
Touch-control sensitivity into touch-screen declines.This is because the touch-screen in suspended state, the coupling electricity between people and mobile phone ground
Hold smaller, i.e. it is appreciated that cannot be formed into a loop between people, touch-screen and mobile phone ground, in this way, drive cannot be shunted well
The electric current of dynamic passage and induction channels, in some instances it may even be possible to which the couple current between increase driving passage and induction channels, causes to sense
Channel reception to inductive signal cannot reflect actual coupled capacitor exactly.
It should be noted that in the embodiment of the present application, the ground of mobile phone is can be understood as, with the earth (that is, ground mobile phone
Ball) it is different ground.
In view of this, the embodiment of the present application proposes a kind of contact panel, can utilize floating ground technology so that induction channels are examined
The coupling capacitance measured can truly reflect touch coupled capacitor caused by touch-screen from the influence of suspended state
Variable quantity, so as to accurately determine the coordinate information of touch point.
Hereinafter, the method for describing the definite touch point according to the embodiment of the present application in detail with reference to Fig. 2 and Fig. 3.
Fig. 2 is the schematic diagram according to the contact panel 200 of the embodiment of the present application.As shown in Fig. 2, the contact panel
200 can be connected with main control chip 300, and be configured in terminal device.The contact panel 200 includes：Drive module 210, touch
Control chip 220, multiple driving passages 230 and multiple induction channels 240.Wherein, passage 230 and induction channels 240 are driven to distinguish
It is connected with touch chip 220.Specifically, passage 230 and induction channels 240 are driven to be located at the lower section of glass cover-plate.Also, touch-control
Drive circuit and sensor circuit can be included in chip 220, is connected respectively with driving passage 230 and induction channels 240.Ying Li
Solution, although glass cover-plate, drive circuit and sensor circuit are not shown in fig. 2, this should not form any restriction to the application.
It should be noted that the multiple driving passages shown in figure and formal distribution of multiple induction channels to intersect vertically
With below glass cover-plate, but being only for exemplary illustration, driving passage can be understood as driving electrodes, be distributed in same plane
(for example, being denoted as plane #1), induction channels can be understood as induction electrode, be distributed in another plane (for example, being denoted as plane #2),
Two planes (that is, the plane #1 and plane #2) stacked on top, and below glass cover-plate.Wherein, above and below two planes
Stacking can allow driving passage to be distributed with induction channels according to orthogonal mode, in each driving passage and sense
Answering the intersection point of passage, there are a mutual capacitance.It is to be understood that driving passage and induction channels are distributed only in a manner of orthogonal
A kind of possible implementation for being used to detect touch-screen coupled capacitor, forms any restriction, as long as often without tackling the application
It is a driving passage and each induction channels between exist the intersection point that one can produce mutual capacitance, and it is the plurality of driving passage and
The intersection point of the plurality of induction channels can be distributed evenly in below whole touch-screen, should all fall into the protection domain of the application
It is interior.In the embodiment of the present application, for convenience of description, the intersection point for driving passage and induction channels can be denoted as induction point.
In the embodiment of the present application, drive module can export the first drive signal to touch chip and the second driving is believed
Number, wherein, the voltage difference between the first drive signal and the second drive signal is basically unchanged, i.e. for the work of multiple driving passages
Make voltage.Voltage difference between first drive signal and the second drive signal is used to drive multiple driving passages so that multiple
Induction channels can collect inductive signal.Touch chip and then the seat that the touch point on contact panel is determined according to inductive signal
Mark information.
Here it is to be noted that it the voltage difference of second drive signal and the first drive signal is multiple available for driving
Drive passage.Specifically, which can be used for driving each driving passage in the plurality of driving passage successively；Alternatively,
At least one driving passage in the plurality of driving passage can also be once driven, and to the plurality of drive within a scan period
Each driving passage of dynamic passage is completed once to drive；Alternatively, it can also once complete the driving of the plurality of driving passage.That is,
The driving voltage is required for traveling through multiple driving passages within each scan period.Then, by multiple induction channels gather because
The coupled signal (in other words, inductive signal) being subject between multiple driving passages of voltage difference driving and multiple induction channels, and then
For positioning the touch point on the contact panel.
It should be noted that the voltage difference of second drive signal and the first drive signal is basically unchanged, it can be understood as,
Change in an acceptable scope, that is to say, that the voltage difference changed in the acceptable scope is for driving
When stating driving channels operation, it is the influence that will not cause substance, is insignificant in other words.It is to be understood that driving passage and
The concrete operating principle and process of induction channels hereinbefore have been combined Fig. 1 and are explained in detail, here for sake of simplicity, no longer
Repeat.
Alternatively, which can receive the synchronous input signal synchronous with touch chip first, and to the synchronization
Input signal is handled, and obtains the first drive signal.
For example, the synchronous input signal can be inputted from touch chip to the drive module, can also be by other module (examples
Such as, other modules in the terminal device of the contact panel are configured) to the drive module input, though the synchronous input signal by
Which module input, is required for guarantee synchronous with touch chip, specifically, with being used to drive multiple drives in the touch chip
The output of the drive circuit of dynamic channels operation keeps synchronous.
In the embodiment of the present application, which can be rectangular wave.Typically, which is side
Ripple, i.e. duty cycle is 50% rectangular wave.
Drive circuit is to multiple driving passage input service voltages (in other words, driving voltage), to be obtained by induction channels
The inductive signal (in other words, coupled signal) between each driving passage and the intersection point of each induction channels is taken, so that it is determined that touch point
Coordinate information (process can combine Fig. 3 below and describe in detail).
Therefore, the first drive signal is sent to touch chip by the embodiment of the present application by drive module so that touch-control core
The first drive signal has been accessed in one end that piece is originally used for catcher machine ground, and in other words, drive module with instead of mobile phone, becomes
The ground connection reference point of touch chip, i.e. touch chip thinks that the input terminal of first drive signal is reference ground, so as to fulfill floating
Ground.Floating ground, you can be connected with being interpreted as the ground of the circuit without conductor with mobile phone.And (in other words, driven relative to touch chip
Passage) for, using the input terminal of first drive signal as reference, become there is fluctuation to believe originally the mobile phone of no fluctuation signal
Number, and people be in the state that is connected with mobile phone, therefore, when people's touch glass cover board, can produce inductive signal, induction channels
The inductive signal detected is fed back into touch chip, and then determines the coordinate information of touch point.
Therefore, the contact panel by drive module ground terminal input synchronization output signal, and with touch chip
Ground connects, and the touch chip is realized floating ground, meanwhile, by connecting electricity between the feeder ear and ground terminal of the touch chip
Hold, the voltage at both ends is maintained at the operating voltage of driving passage, thus, touch chip will not be perceived relative to mobile phone ground
Signal intensity, realizes floating ground technology.
Alternatively, as shown in Fig. 2, the touch chip 220 may further include：Synchronous output end 221, the first feeder ear
222 and first ground terminal 223；The drive module 210 may further include：Synchronous input end 211, the second feeder ear 212,
Two ground terminals 213 and operating voltage input terminal 214.
Wherein, touch chip 220 sends synchronization by synchronous output end 221 to the synchronous input end 211 of drive module 210
Input signal, the drive module 210 obtain the first drive signal by being handled the synchronous input signal.Meanwhile drive
Module receives second drive signal by the operating voltage input terminal.Synchronous input end 211 connects with the second ground terminal 213
Connect, the second ground terminal 213 is connected with the first ground terminal 223, and the first feeder ear 222 is connected with the second feeder ear 212, the second ground connection
End 213 is used to input the first drive signal to the first ground terminal 223, and the second feeder ear 212 is used to input to the first feeder ear 222
Second drive signal.Capacitance 215 is parallel between second feeder ear 212 and the second ground terminal 213, which is used to keep
Voltage difference between second drive signal and the first drive signal, in other words, for buffering the change of the voltage difference.
It is appreciated that the pressure difference between the first feeder ear and the second feeder ear can be zero, the first ground terminal connects with second
Pressure difference between ground terminal can be zero.
With reference to Fig. 3 and the circuit diagram of two functions of being used for drive module illustrated in fig. 4, the driving is described in detail
Module handles synchronous input signal to obtain the detailed process of the first drive signal.It should be understood that Fig. 3 and Fig. 4 is only to use
In a kind of possible implementation for realizing floating ground technology, any restriction is formed without tackling the application, the application is not precluded from
The also possibility of other circuits for being used for realization floating ground technology.
Fig. 3 is the schematic circuit according to the drive module 210A of the application one embodiment.As shown in figure 3, the drive
Dynamic model block 210A includes：First phase inverter 216, the second phase inverter 217 and the first diode 218.Wherein, first phase inverter
216 are connected in series with second phase inverter 217, and the input terminal of first phase inverter 216 is connected with the synchronous input end 211, should
The output terminal of second phase inverter 217 is connected with second ground terminal 213, which passes through the first diode
218 are connected with second feeder ear 212, and the operating voltage input terminal 214 and first phase inverter 216 and second phase inverter
217 operating voltage end is connected, for first phase inverter 216 and the 217 input service voltage (example of the second phase inverter
Such as, 3.3V), wherein, the cathode of first diode 218 is connected with the operating voltage input terminal 214, first diode 218
Anode be connected with second feeder ear 212.
Within a scan period, which is firstly received synchronous input signal, the synchronous input signal
Can be rectangular wave, for example, square wave, i.e. duty cycle is 50% rectangular wave.The low level of the square wave can be 0V, high level
Can be 3.3V, by the synchronous input signal after the processing of the first phase inverter and the second phase inverter, in the second ground terminal 213
What place obtained is the waveform that low and high level is alternately present, wherein, low level can be 0V, and high level can be 3.3V.
On the other hand, operating voltage input terminal 214 can be used for receiving the second drive signal.In the embodiment of the present application,
Second drive signal can be 3.3V voltages.Second drive signal is by the first diode to being connected in parallel on the second feeder ear
212 and the second capacitance 215 between ground terminal 213 charge so that the electricity between the second feeder ear 212 and the second ground terminal 213
Pressure difference is the driving voltage for driving channels operation.
Specifically, when synchronous input end 211 exports low level, which passes through the one or two
Pole pipe 218 charges to the capacitance 215, the voltage of the second feeder ear 212 is reached 3.3V, while power to touch chip.This feelings
Under condition, the voltage difference of the second feeder ear 212 and the second ground terminal 213 is 3.3V (it is understood that due in the second feeder ear
The first diode is connected between 212 and operating voltage input terminal 214, it is contemplated that the pressure drop of the first diode, second power supply
The actual pressure drop at end 212 might be slightly below 3.3V, i.e. the actual pressure differential of the second feeder ear 212 and the second ground terminal 213 may be omited
Less than 3.3V.It should be understood that this is not the core place of the application, for sake of simplicity, omitted below to same or similar situation
Description).
When synchronous input end 211 exports high level, the output of the second ground terminal is 3.3V, the operating voltage 214 stop to
The capacitance 215 charges, due to the characteristic that capacitance both end voltage cannot be mutated, the voltage of the second feeder ear 212 and the second ground terminal
Difference is still maintained at that 3.3V is constant in a short time, then the voltage of the second feeder ear 212 is lifted to 6.6V, the first diode 218
Cut-off.In this case, capacitance 215 discharges to touch chip, i.e. touch chip operating current is provided by capacitance 215.
Therefore, for touch chip, its ground is become the second ground terminal 213 by original mobile phone, i.e. for
For touch chip, it considers that the second ground terminal 213 is invariable, as reference, the signal that then changes mobile phone.
Hereby it is achieved that floating ground, i.e. the ground of the touch chip is the ground for having fluctuation signal, touch chip using have the ground of fluctuation signal as
Reference, script for touch chip, become have fluctuation signal with not having the mobile phone of fluctuation signal.This fluctuation letter
Number it can be directly coupled on the person, meanwhile, this signal can also be coupled on the earth (that is, the earth), then by greatly also can
There is signal to be coupled on the person, i.e. greatly to play the role of INDIRECT COUPLING.
It is to be understood that the square wave of example above is merely illustrative, which can also be the pulse of different duty
Signal, the application is to this and is not particularly limited, as long as can ensure to provide driving voltage, while guarantee and touch-control to driving passage
The sample-synchronous of signal, should all fall into the protection domain of the application.
Fig. 4 is the schematic circuit according to the drive module 210B of the application another embodiment.As shown in figure 4, should
Drive module 210B includes：Booster circuit 201 and level shifting circuit 202, the 3rd phase inverter 203, the 4th phase inverter 204 and
Two diodes 205.
Wherein, the 3rd phase inverter 203 is connected in series with the 4th phase inverter 204, the input terminal of the 3rd phase inverter 203
It is connected by the level shifting circuit 202 with the synchronous input end 211, the output terminal of the 4th phase inverter 204 second connects with this
Ground terminal 213 is connected, which is connected by the second diode 205 with second feeder ear 212, and the work
The operating voltage end for making voltage input end 214 with the 3rd phase inverter 203 and the 4th phase inverter 204 is connected, for this
3rd phase inverter 203 and 204 input service voltage of the 4th phase inverter, wherein, the cathode of second diode 205 and the work
Voltage input end 214 is connected, and the anode of second diode 205 is connected with second feeder ear 212.
It is to be understood that the operation principle of drive module 210B is similar to the operation principle of drive module 210A, here for letter
It is clean, omit the detailed description to similar portion., can be by drive module 210A and driving mould according to the difference of input service voltage
Block 210B, which is distinguished, is known as low-voltage driving module and high drive module.Specifically, inputted in high drive module by operating voltage
The voltage of input is held because being amplified to 15V being subject to the processing of booster circuit 201, i.e. the second drive signal is 15V voltages.For
The 3.3V voltages of balanced synchronous input end input, use level shifting circuit 202 so that by the 3rd phase inverter 203 and the
The voltage in the second ground terminal 213 that the processing of four phase inverters 204 obtains is 15V.
Therefore, when synchronous input end input low and high level alternating, (for example, low level can be 0V, high level can be
During pulse square wave 3.3V) occurred, alternately change between 0V-15V in the voltage that the second ground terminal 213 measures.
The principle identical with low-voltage driving module, passes through the effect of raising of capacitance 215 so that the second feeder ear 212 and
The voltage difference of two ground terminals 213 maintains 3.3V, and the voltage of the second feeder ear 212 alternately changes between 15-18.3V.
By adding drive module between existing contact panel and main control chip, with logical to driving by drive module
Road provides operating voltage, drive module with instead of the mobile phone of touch chip, so as to realize the floating of touch chip.
It is to be understood that the specific value of the high and low level of above example and the operating voltage of driving passage are merely illustrative
Illustrate, form any restriction without tackling the application, the application also should not necessarily be limited by this.For example, synchronous input end 211 can be with
Two ground terminals 213 are directly connected to, i.e. the drive module can directly be believed the synchronous input signal received as the first driving
Number, in this case, the driving force of the synchronous input signal is sufficiently strong.
It should also be understood that low-voltage driving mould illustrated above first phase inverter in the block and high drive mould the in the block 3rd are anti-
Phase device can be identical or different, and low-voltage driving mould the second phase inverter in the block and high drive mould the 4th phase inverter in the block can
With identical or different, low-voltage driving mould the first diode in the block can be identical with high drive mould the second diode in the block
Or it is different, the application is to this and is not particularly limited.Wherein, first, second, third, fourth is only to be used to distinguish different
Device in drive module, any restriction is formed without tackling the application.
Alternatively, as shown in Fig. 2, the touch chip 220 includes synchronous output end 221, for into the drive module 210
Synchronous input end 211 input the synchronous input signal, it is synchronous with touch chip to be used for realization the synchronous input signal.
Here, it is necessary to which explanation, the synchronous input signal can be inputted from touch chip to the drive module, this situation
Under, which can be synchronous with the touch chip, and it is steady on the one hand to ensure that the driving passage into touch chip provides
Fixed driving voltage, on the other hand ensures touching signals sampling and the synchronization of drive signal, to guarantee to collect correctly
Data.
It should be understood that this is only a kind of possible implementation, which can also be by other modules, example
Such as, main control chip referred to hereafter, to the drive module input, in the case, the synchronous input signal similarly need with
Touch chip is synchronous, and this requires main control chip is synchronous with touch chip.
In the embodiment of the present application, which can be configured in terminal device.Referring again to Fig. 2, alternatively,
The terminal device further includes main control chip 100.The main control chip 100 is connected with drive module 210, to be inputted by operating voltage
214 are held to 210 input service voltage of drive module.
Alternatively, as shown in Fig. 2, the touch chip 220 can be connected by communication bus with main control chip 100, with to
Main control chip 100 sends the elements of a fix of touch point, in order to which main control chip 100 is according to the elements of a fix, is located accordingly
Reason.
It should be noted that being only to readily appreciate in figure, main control chip, drive module and touch chip, but this are shown
Any restriction should not be formed to the application, other modules or list in addition to above-mentioned enumerate can also be included in the terminal device
Member, for sake of simplicity, will not enumerate here.
It should also be noted that, in figure be only readily appreciate and illustrate, by main control chip, drive module and touch chip with
Self-existent form is shown, but this should not form any restriction to the application, and the application also should not necessarily be limited by this.For example, driving
Module can be configured in main control chip, or can also be configured in touch chip.The application is for each module or unit
Specific existence form is simultaneously not particularly limited, as long as above-mentioned corresponding function can be completed.
Hereinafter, with reference to Fig. 5, the contact panel for describing the embodiment of the present application in detail is used for the detailed process for positioning touch point.
Fig. 5 is the sequence diagram of the drive signal for detected touch point of the contact panel applied to the embodiment of the present application.
As shown in figure 5, within a scan period (for example, n-th cycle shown in figure, alternatively, the N+1 cycle), it is synchronous defeated
Outlet exports synchronous input signal to synchronous input end first, by the processing of drive module, obtains the first drive signal, and second
Ground terminal sends first drive signal to the first ground terminal, for example, can be 15V.Assuming that the second feeder ear and the second ground connection
The voltage difference at end is 3.3V, due to the bootstrapping of the capacitance effect of raising, the voltage of the first feeder ear can be raised to 18.3V.
Synchronous input end continuously transmits multiple synchronous input signal within a scan period, so that each sensing is logical
Road is all transfused to the second drive signal respectively, completes single pass.Alternatively, the first feeder ear can be logical to multiple sensings successively
Each induction channels in road input the second drive signal, as shown in figure 3, the second drive signal is sequentially input by Tx1 to Tx4,
Rx1 to Rx4 carries out one-time detection, to gather Tx1 to Tx4 and Rx1 to Rx4 while the second drive signal is inputted each time
Each intersection point coupled capacitor variable quantity.
Here it is to be noted that it although to be all respectively received drive signal (that is, right by Tx1 shown in figure to Tx4
Should be in the rectangular wave in Fig. 5), but in fact, the amplitude of the rectangular wave can not be measured to.Since the ground of touch chip is floating
Ground, as reference, Tx1 to Tx4 is not fluctuated on the ground to be floated using itself, and the rectangular wave shown in figure is only to receive driving electricity
The signal of (in other words, control signal) is pressed, any restriction is formed without tackling the application.
Here, it is necessary to which explanation, the time span of scan period are generally very short.Typically, scan period can be with
For 10 milliseconds (ms), to ensure the time span touched much smaller than touch-screen, i.e. touch-screen is clicked the time span of touch
It can complete the scanning of at least one scan period.
It should also be noted that, what is shown in figure inputs the second driving letter to Tx1 to Tx4 successively within a scan period
Number method be merely illustrative, any restriction should not be formed to the application.First feeder ear can be every time only to multiple senses
One or more of passage induction channels are answered to input the second drive signal, as long as ensureing to travel through within each scan period
All induction channels.
Fig. 6 (including Fig. 6 a and Fig. 6 b) shows the circuit diagram of the contact panel of the embodiment of the present application.Wherein, Fig. 6 a
Show circuit diagram of the contact panel of the embodiment of the present application in the case where not touched, Fig. 6 b show the application
Circuit diagram of the contact panel of embodiment in the case where being touched.
For purposes of illustration only, only it is with an induction point (that is, one driving passage and the intersection point of an induction channels) here
Example illustrates.As shown in Figure 6 a, in the case where contact panel is not touched, there is capacitance between the driving passage and floating ground
Cdg, there is capacitance C between the induction channels and floating groundsg, the driving passage and the induction channels have mutual capacitance Cx.Wherein, Vf
For the first drive signal (for example, can be 3.3V), VsFor the voltage of induction channels, VrefIt can be one solid for reference voltage
Definite value, is connected with the end in the same direction of operational amplifier, to obtain V by comparingout, the VoutValue can correspond to shown in Fig. 7
Induction point data, be hereinafter discussed in greater detail.VcTo offset the voltage of (Cancel) circuit, pass through CcRealize and offset together
CxAnd CsgCaused by voltage output.Cancel circuits can be same as the prior art, and not this Applicant's Abstract graph core where, here for
It is succinct, repeat no more.
As shown in Figure 6 b, in the case where contact panel is touched, except existing capacitance Cdg、CsgAnd Cx, due to
Finger touch sensible point position corresponding on glass cover-plate, can produce the capacitance C between driving passage and human bodyd, sense
Answer capacitance C between passage and human bodys, and the capacitance C between human body and floating groundhg.Wherein, CdWith CdgParallel connection, CsWith CsgParallel connection,
Thus cause to drive passage and the mutual capacitance C of induction channelscReduce △ C.The reduction of mutual capacitance causes the V of outputout' become
Change.Thus, it is possible to the V that is obtained in Fig. 6 aoutIt is compared, and then positions touch point.
Fig. 7 (including Fig. 7 a and Fig. 7 b) shows that the capacitance variations of each induction point in the contact panel of the embodiment of the present application are shown
It is intended to.Fig. 7 a show contact panel each faradic capacitance variations signal when detecting touch point of the embodiment of the present application
Figure.Fig. 7 b show the capacitance variations obtained after handling the capacitance variations of each induction point the signal of the embodiment of the present application
Figure.
As shown in Figure 7a, contact panel can detect touch point by the above method, and saturate position can be with figure
The position (in other words, central area) nearer apart from touch point is interpreted as, position of light color can be understood as apart from touch point
Remote position (in other words, fringe region).It can be seen that in undressed capacitance variations schematic diagram, coupling is detected
The quantity of the changed induction point of capacitance is more, after algorithm process, has obtained capacitance variations signal as shown in Figure 7b
Figure.The quantity of the changed induction point of coupled capacitor obtained after treatment significantly reduces, also, similar to Fig. 7 a,
Saturate position can be understood as the position nearer apart from touch point, position of light color can be understood as apart from touch point compared with
Remote position.Thus, it is possible to the coordinate information of touch point is determined very accurately.
It should be noted that algorithm process mentioned here can be handled using method of the prior art.Specifically,
By taking Fig. 7 a and Fig. 7 b as an example, first, average often capable in the data matrix of Fig. 7 a is obtained, and by the data of Fig. 7 a data matrixes all
The average value of corresponding row is subtracted, obtains the intermediate data matrix handled through space；Thereafter, intermediate data above-mentioned steps obtained
Matrix Calculating column average value, and the data in the intermediate data matrix of the first step are all subtracted to the average value of respective column, obtain by
The new data matrix of column processing, the data matrix are exactly the characteristic matrix shown in Fig. 7 b.
Therefore, the contact panel of the embodiment of the present application, touch chip is sent to by drive module by the first drive signal,
So that the first drive signal has been accessed in one end that touch chip is originally used for catcher machine ground, in other words, drive module instead of hand
Machine, becomes the ground connection reference point of touch chip, i.e. touch chip thinks that the input terminal of first drive signal is reference
Ground, so as to fulfill floating.And for touch chip (in other words, driving passage), with the input of first drive signal
Hold as reference, become have fluctuation signal the mobile phone of no fluctuation signal originally, and people is in the state being connected with mobile phone
, therefore, when people's touch glass cover board, can produce inductive signal, and the inductive signal detected is fed back to touch-control core by induction channels
Piece, and then determine the position of touch point.So as to by floating solve the problems, such as that the touch-control sensitivity brought by suspended state declines.
More than, the contact panel of the embodiment of the present application is described in detail with reference to Fig. 2 to Fig. 7.Hereinafter, with reference to Fig. 8 specifically
The method for detected touch point of bright the embodiment of the present application.
Fig. 8 is the indicative flowchart according to the method 600 for detected touch point of the embodiment of the present application.This method
600 are applied to be configured with the terminal device of contact panel, which includes：Drive module, touch chip, multiple drivings
Passage and multiple induction channels, the drive module are connected with the touch chip, the plurality of driving passage and the plurality of induction channels
It is connected respectively with the touch chip.Included module or unit are as noted before in the contact panel.As shown in fig. 6, should
Method 600 includes：
S610, the touch chip receive the first drive signal and the second drive signal of drive module transmission, this first
Voltage difference between drive signal and second drive signal is used to drive the plurality of driving channels operation, and the first driving letter
Voltage difference number between second drive signal is constant；
S620, the plurality of induction channels gather inductive signal, the inductive signal for be subject to second drive signal with this
Coupled signal between the plurality of driving passage of voltage difference driving between one drive signal and the plurality of induction channels；
S630, the touch chip determine the coordinate information of the touch point on contact panel according to inductive signal.
Alternatively, before the first drive signal that the touch chip receives drive module transmission, this method 600 is also wrapped
Include：
The drive module receives synchronous input signal, which is the rectangular wave synchronous with the touch chip；
The drive module handles the synchronous input signal, obtains and exports first drive signal.
Alternatively, which includes the first feeder ear and the first ground terminal, and it is defeated which includes operating voltage
Enter end, synchronous input end, the second feeder ear and the second ground terminal, this method 600 further includes：
The drive module receives the synchronous input signal by synchronous input end, and is grounded by the second ground terminal to first
End inputs first drive signal；
The drive module receives second drive signal by operating voltage input terminal, and by the second feeder ear to first
Feeder ear inputs second drive signal.
Alternatively, which further includes main control chip, which is connected with the drive module,
This method 600 further includes：
The main control chip inputs second drive signal to the operating voltage input terminal.
Alternatively, which further includes main control chip, which is connected with the main control chip by communication bus
Connect,
This method 600 further includes：
The touch chip sends the coordinate information by the communication bus to the main control chip.
It is to be understood that each step or flow of the method 600 for detected touch point of the embodiment of the present application, may correspond to this
Apply for the above and other operation and/or function of the modules of the contact panel 200 in embodiment, for sake of simplicity, herein not
Repeat again.
It is to be understood that in the various embodiments of the application, the size of the sequence number of above-mentioned each process is not meant to perform suitable
The priority of sequence, the execution sequence of each process should be determined with its function and internal logic, without the implementation of reply the embodiment of the present application
Process forms any restriction.
The embodiment of the present application additionally provides a kind of terminal device, and the schematic block diagram of the terminal device is as shown in Figure 9.Fig. 9
It is the schematic block diagram according to the terminal device 900 of the embodiment of the present application.As shown in figure 9, the terminal device 900 includes master control core
Piece 910 and contact panel 920.
Wherein, which is connected with the touch chip of the touch chip.
It is to be understood that the contact panel can be the contact panel described above in conjunction with Fig. 2 to Fig. 7, which leads to
Cross contact panel determine touch point coordinate information specific method and process hereinbefore have been described in, here for letter
It is clean, repeat no more.
Therefore, the first drive signal is sent to touch chip by the embodiment of the present application by drive module so that touch-control core
The first drive signal has been accessed in one end that piece is originally used for catcher machine ground, and in other words, drive module with instead of mobile phone, becomes
The ground connection reference point of touch chip, i.e. touch chip thinks that the input terminal of first drive signal is reference ground, so as to fulfill floating
Ground.And for touch chip (in other words, driving passage), using the input terminal of first drive signal as reference, originally
Become have fluctuation signal with there is no the mobile phone of fluctuation signal, and people is to be in the state being connected with mobile phone, therefore, people touches glass
Inductive signal can be produced during glass cover board, the inductive signal detected is fed back to touch chip by induction channels, and then determines to touch
The coordinate information of point.So as to by floating solve the problems, such as that the touch-control sensitivity brought by suspended state declines.
It is to be understood that in the various embodiments of the application, the size of the sequence number of above-mentioned each process is not meant to perform suitable
The priority of sequence, the execution sequence of each process should be determined with its function and internal logic, without the implementation of reply the embodiment of the present application
Process forms any restriction.
Those of ordinary skill in the art may realize that each exemplary list described with reference to the embodiments described herein
Member and algorithm steps, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
Performed with hardware or software mode, application-specific and design constraint depending on technical solution.Professional technician
Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed
Scope of the present application.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Division, is only a kind of division of logic function, can there is other dividing mode, such as multiple units or component when actually realizing
Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit
Close or communicate to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the application can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units integrate in a unit.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, the technical solution of the application is substantially in other words
The part to contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server, or network equipment etc.) perform each embodiment the method for the application all or part of step.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
The above, is only the embodiment of the application, but the protection domain of the application is not limited thereto, any
Those familiar with the art can readily occur in change or replacement in the technical scope that the application discloses, and should all contain
Cover within the protection domain of the application.Therefore, the protection domain of the application should be based on the protection scope of the described claims.
Claims (14)
- A kind of 1. contact panel, it is characterised in that including：Drive module, touch chip, multiple driving passages and multiple sensings are logical Road, the drive module are connected with the touch chip, it is the multiple driving passage and the multiple induction channels respectively with institute Touch chip connection is stated, wherein,The touch chip is used to receive the first drive signal and the second drive signal that the drive module is sent, to pass through The voltage difference stated between the first drive signal and second drive signal drives the multiple driving channels operation；The multiple induction channels are used to gather inductive signal, the inductive signal for be subject to first drive signal with it is described Coupled signal between the multiple driving passage of voltage difference driving between second drive signal and the multiple induction channels；The touch chip is used for the coordinate information that the touch point on contact panel is determined according to the inductive signal.
- 2. contact panel according to claim 1, it is characterised in that the drive module is additionally operable to receive synchronous input letter Number, and the synchronous input signal is handled, to obtain and export first drive signal, wherein, the synchronization is defeated It is the rectangular wave synchronous with the touch chip to enter signal.
- 3. contact panel according to claim 2, it is characterised in that the touch chip includes the first feeder ear and first Ground terminal, the drive module includes operating voltage input terminal, synchronous input end, the second feeder ear and the second ground terminal, described Synchronous input end is connected with second ground terminal, and second ground terminal is connected with first ground terminal, and described first supplies Electric end is connected with second feeder ear,The drive module is specifically used for receiving the synchronous input signal by the synchronous input end, and passes through the work Voltage input end receives second drive signal；The drive module is specifically used for inputting the first driving letter to first ground terminal by second ground terminal Number, and second drive signal is inputted to first feeder ear by second feeder ear, second feeder ear with Capacitance is parallel between second ground terminal, the capacitance is used to keep second drive signal to drive letter with described first Voltage difference between number is basically unchanged.
- 4. contact panel according to claim 3, it is characterised in that the drive module includes：First phase inverter, second Phase inverter and the first diode,Wherein, first phase inverter is connected with second inverter series, the input terminal of first phase inverter with it is described Synchronous input end is connected, and the output terminal of second phase inverter is connected with second ground terminal, the operating voltage input terminal It is connected by first diode with second feeder ear, to believe to second feeder ear input, second driving Number, and the operating voltage input terminal is connected with the operating voltage end of first phase inverter and second phase inverter.
- 5. contact panel according to claim 3, it is characterised in that the drive module includes：3rd phase inverter, the 4th Phase inverter, the second diode, booster circuit and level shifting circuit,Wherein, the 3rd phase inverter is connected with the 4th inverter series, and the input terminal of the 3rd phase inverter passes through institute State level shifting circuit with the synchronous input end to be connected, output terminal and the second ground terminal phase of the 4th phase inverter Even, the operating voltage input terminal is connected by second diode with second feeder ear, to power to described second End inputs second drive signal, and the operating voltage input terminal by the booster circuit and the 3rd phase inverter and The operating voltage end of 4th phase inverter is connected.
- 6. contact panel according to any one of claim 1 to 5, it is characterised in that the touch chip includes synchronous Output terminal, the synchronous input signal is inputted for the synchronous input end into the drive module.
- 7. contact panel according to any one of claim 1 to 6, it is characterised in that the contact panel is configured at end In end equipment, the drive module is connected with the main control chip of the terminal device, and the drive module receives main control chip and passes Defeated second drive signal.
- 8. contact panel according to any one of claim 1 to 7, it is characterised in that the contact panel is configured at end In end equipment, the touch chip is connected with the main control chip of the terminal device by communication bus, and the touch chip is also For sending the coordinate information to the main control chip by the communication bus.
- 9. a kind of terminal device, it is characterised in that including main control chip and such as touch-control described in any item of the claim 1 to 8 Panel,Wherein, the main control chip is connected with the touch chip of the contact panel.
- A kind of 10. method for detected touch point, it is characterised in that the method is applied to the terminal for being configured with contact panel In equipment, the contact panel includes：Drive module, touch chip, multiple driving passages and multiple induction channels, the driving Module is connected with the touch chip, and the multiple driving passage and the multiple induction channels connect with the touch chip respectively Connect, the described method includes：The touch chip receives the first drive signal and the second drive signal that the drive module is sent, and according to described the Voltage difference between one drive signal and second drive signal drives the multiple driving channels operation；The multiple induction channels gather inductive signal, and the inductive signal is to be subject to first drive signal and described second Coupled signal between the multiple driving passage of voltage difference driving between drive signal and the multiple induction channels；Touch chip determines the coordinate information of the touch point on contact panel according to the inductive signal.
- 11. according to the method described in claim 10, sent it is characterized in that, receiving the drive module in the touch chip The first drive signal before, the method further includes：The drive module receives synchronous input signal, and the synchronous input signal is the rectangle synchronous with the touch chip Ripple；The drive module handles the synchronous input signal, obtains and exports first drive signal.
- 12. according to the method for claim 11, it is characterised in that the touch chip connects including the first feeder ear and first Ground terminal, the drive module include operating voltage input terminal, synchronous input end, the second feeder ear and the second ground terminal,The method further includes：The drive module receives the synchronous input signal by the synchronous input end, and by second ground terminal to First ground terminal inputs first drive signal；The drive module receives second drive signal by the operating voltage input terminal, and powers by described second Hold to first feeder ear and input second drive signal.
- 13. according to the method for claim 12, it is characterised in that the terminal device further includes main control chip, the side Method further includes：The main control chip inputs second drive signal to the operating voltage input terminal.
- 14. the method according to any one of claim 10 to 13, it is characterised in that the terminal device further includes master control Chip,The method further includes：The touch chip sends the coordinate information by communication bus to the main control chip.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/108549 WO2018102958A1 (en) | 2016-12-05 | 2016-12-05 | Touch panel, terminal device, and method for use in detecting touched point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107995967A true CN107995967A (en) | 2018-05-04 |
Family
ID=62028843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680001630.8A Pending CN107995967A (en) | 2016-12-05 | 2016-12-05 | A kind of contact panel, terminal device and the method for detected touch point |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10627950B2 (en) |
| EP (1) | EP3358450A4 (en) |
| CN (1) | CN107995967A (en) |
| WO (1) | WO2018102958A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108920017A (en) * | 2018-08-21 | 2018-11-30 | 广州视源电子科技股份有限公司 | Touch screen and its driving method and device |
| CN109002202A (en) * | 2018-06-15 | 2018-12-14 | Oppo广东移动通信有限公司 | Touching display screen driving circuit, touch control display and electronic device |
| CN110427128A (en) * | 2019-08-29 | 2019-11-08 | 深圳市德名利电子有限公司 | Multichannel driving method, multichannel driving device and touch panel |
| WO2020034123A1 (en) * | 2018-08-15 | 2020-02-20 | 深圳市汇顶科技股份有限公司 | Touch control chip, electronic device, and touch control method |
| CN111600590A (en) * | 2020-07-21 | 2020-08-28 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit and touch chip |
| CN112882400A (en) * | 2021-01-12 | 2021-06-01 | 杭州芯格微电子有限公司 | Driving multiple I's simultaneously2Method for C slave device and chip driven by controller simultaneously |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699326A (en) * | 2013-12-27 | 2014-04-02 | 深圳天珑无线科技有限公司 | Touch processing method and terminal device |
| CN104573649A (en) * | 2014-12-30 | 2015-04-29 | 深圳市汇顶科技股份有限公司 | Fingerprint recognition sensor and terminal equipment |
| CN105760028A (en) * | 2015-01-05 | 2016-07-13 | 辛纳普蒂克斯公司 | Point to point interface communication and reference |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101305924B1 (en) * | 2012-10-23 | 2013-09-09 | 엘지디스플레이 주식회사 | Display device and driving method thereof |
| CN103049158B (en) * | 2012-12-31 | 2016-03-16 | 深圳市汇顶科技股份有限公司 | A kind of touch detecting method of capacitive touch screen and system |
| KR20150001487A (en) * | 2013-06-27 | 2015-01-06 | 크루셜텍 (주) | Touch detecting apparatus and method |
| CN103488366B (en) * | 2013-09-30 | 2016-06-15 | 北京京东方光电科技有限公司 | Touch-control display panel and display device |
| CN103698949A (en) * | 2013-12-27 | 2014-04-02 | 合肥京东方光电科技有限公司 | Array substrate, display device and driving method thereof |
| KR20150087758A (en) * | 2014-01-22 | 2015-07-30 | (주) 엔피홀딩스 | Bezeless touch screen |
| CN105335009B (en) * | 2015-12-03 | 2023-08-08 | 敦泰科技(深圳)有限公司 | Touch display device and electronic equipment |
| CN205334417U (en) * | 2015-12-03 | 2016-06-22 | 深圳磨石科技有限公司 | Touch display apparatus and electronic equipment |
-
2016
- 2016-12-05 CN CN201680001630.8A patent/CN107995967A/en active Pending
- 2016-12-05 WO PCT/CN2016/108549 patent/WO2018102958A1/en unknown
- 2016-12-05 EP EP16915922.5A patent/EP3358450A4/en not_active Ceased
-
2018
- 2018-03-20 US US15/927,062 patent/US10627950B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699326A (en) * | 2013-12-27 | 2014-04-02 | 深圳天珑无线科技有限公司 | Touch processing method and terminal device |
| CN104573649A (en) * | 2014-12-30 | 2015-04-29 | 深圳市汇顶科技股份有限公司 | Fingerprint recognition sensor and terminal equipment |
| CN105760028A (en) * | 2015-01-05 | 2016-07-13 | 辛纳普蒂克斯公司 | Point to point interface communication and reference |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002202A (en) * | 2018-06-15 | 2018-12-14 | Oppo广东移动通信有限公司 | Touching display screen driving circuit, touch control display and electronic device |
| CN109002202B (en) * | 2018-06-15 | 2021-05-14 | Oppo广东移动通信有限公司 | Touch display screen driving circuit, touch display and electronic device |
| WO2020034123A1 (en) * | 2018-08-15 | 2020-02-20 | 深圳市汇顶科技股份有限公司 | Touch control chip, electronic device, and touch control method |
| US11119603B2 (en) | 2018-08-15 | 2021-09-14 | Shenzhen GOODIX Technology Co., Ltd. | Touch control chip, electronic device having the same and touch detection method therefor |
| CN108920017A (en) * | 2018-08-21 | 2018-11-30 | 广州视源电子科技股份有限公司 | Touch screen and its driving method and device |
| WO2020037867A1 (en) * | 2018-08-21 | 2020-02-27 | 广州视源电子科技股份有限公司 | Touch screen and driving method and apparatus therefor |
| CN110427128A (en) * | 2019-08-29 | 2019-11-08 | 深圳市德名利电子有限公司 | Multichannel driving method, multichannel driving device and touch panel |
| CN111600590A (en) * | 2020-07-21 | 2020-08-28 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit and touch chip |
| CN111600590B (en) * | 2020-07-21 | 2020-11-03 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit and touch chip |
| CN112882400A (en) * | 2021-01-12 | 2021-06-01 | 杭州芯格微电子有限公司 | Driving multiple I's simultaneously2Method for C slave device and chip driven by controller simultaneously |
| CN112882400B (en) * | 2021-01-12 | 2022-10-25 | 杭州芯格微电子有限公司 | Driving multiple I's simultaneously 2 Method for C slave device and chip driven by controller simultaneously |
Also Published As
| Publication number | Publication date |
|---|---|
| US20180210606A1 (en) | 2018-07-26 |
| EP3358450A4 (en) | 2018-12-05 |
| WO2018102958A1 (en) | 2018-06-14 |
| EP3358450A1 (en) | 2018-08-08 |
| US10627950B2 (en) | 2020-04-21 |
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